CN202307177U - Underwater operating device for disassembling and assembling nuts of nuclear fuel assembly framework - Google Patents

Underwater operating device for disassembling and assembling nuts of nuclear fuel assembly framework Download PDF

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Publication number
CN202307177U
CN202307177U CN2011203889067U CN201120388906U CN202307177U CN 202307177 U CN202307177 U CN 202307177U CN 2011203889067 U CN2011203889067 U CN 2011203889067U CN 201120388906 U CN201120388906 U CN 201120388906U CN 202307177 U CN202307177 U CN 202307177U
Authority
CN
China
Prior art keywords
sleeve
fuel assembly
nuclear fuel
core bar
key head
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN2011203889067U
Other languages
Chinese (zh)
Inventor
何少华
陈梁
李涛
童阜忠
范伟丰
侯立巍
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qinshan Nuclear Power Co Ltd
Original Assignee
Qinshan Nuclear Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qinshan Nuclear Power Co Ltd filed Critical Qinshan Nuclear Power Co Ltd
Priority to CN2011203889067U priority Critical patent/CN202307177U/en
Application granted granted Critical
Publication of CN202307177U publication Critical patent/CN202307177U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00Energy generation of nuclear origin
    • Y02E30/30Nuclear fission reactors

Abstract

The utility model relates to the technical field of framework disassembly in the process of repairing a nuclear fuel assembly and particularly discloses an underwater operating device for disassembling and assembling nuts of a nuclear fuel assembly framework. The underwater operating device comprises a sleeve, a core rod and a sleeve spanner head, wherein the sleeve is of a stepped cylinder structure; the lower end of the sleeve is fixedly provided with the sleeve spanner head; the inner wall of the through hole of the sleeve spanner head is in close fit with the nuts of the nuclear fuel assembly framework; the core rod is a long thin rod throughout the sleeve and the sleeve spanner head; the lower end of the core rod is provided with a pushing block; and the pushing block can move up and down in the cavity of the through hole of the sleeve spanner head. The underwater operating device can realize the functions of underwater disassembling and assembling the nuts of the nuclear fuel assembly framework; besides, the upper end of the core rod is supported by a spring, while the lower end of the core rod is provided with the pushing block which can ensure that the nuts can be pushed out after the nuts are disassembled from the nuclear fuel assembly framework; and the pushing block does not influence other operations when not in need.

Description

A kind of underwater operation device that is used for the dismounting of nuclear fuel assembly skeleton nut
Technical field
The utility model belongs to skeleton dismantling technology field in the nuclear fuel assembly repair process, is specifically related to a kind of underwater operation device that is used for the dismounting of nuclear fuel assembly skeleton nut.
Background technology
Nuclear power plant reloads in the process; Sometimes find that multiplexing fuel rod breakage and spacer grid of fuel assembly coaming plate have injury event in various degree, damaged security, economy, refuelling scheme and the overhaul duration of reloading to power plant's operation of fuel assembly appearance all produces significant impact behind the irradiation.The damaged leakage of fuel rod can cause radioactive fission product to leak in the circuit cools agent; Cause the increase and the staff of system's radioactive level to accept unnecessary radiation dose, damaged fuel assembly considers that the risk control of security of operation does not allow to go into again stack operation in principle.The local slight damage of spacer grid of fuel assembly coaming plate is meant the local slight damage of the peripheral coaming plate of screen work behind the irradiation, outer the sticking up of indivedual guide vane distortion.The local slight damage of grid spacer coaming plate, the outer fuel assembly that sticks up of guide vane distortion are in loading and unloading material process; Be easy to block, scrape, draw, cause the mutual hook damage of adjacent fuel assembly, make greatly difficulty of loading and unloading material generation with the generation of adjacent fuel assembly; And be in operation and also possibly cause damage the grid spacer of adjacent fuel assembly; Threaten the safe operation of fuel assembly, therefore, the local slight damage of grid spacer coaming plate, the outer assembly that sticks up of guide vane distortion could use after must proofreading and correct.Spacer grid of fuel assembly coaming plate major injury is meant that the screen work coaming plate seriously tears, sticks up and the guide vane gross distortion outward behind the irradiation; Greatly difficulty takes place except making the loading and unloading material in this major injury; Also cause fuel list rod that wear phenomenon takes place in the middle of operation easily; If these assemblies are not handled, in view of safe consideration will not allow back heap multiplexing.
Therefore, need repair under water damaged fuel assembly behind the irradiation.Because fuel assembly by assigning fuel rod to form in the skeleton structure, therefore will be checked and the refuelling rod, must dismantle end fitting through dismounting skeleton nut, thereby take, recombinate skeleton structure apart.In this process, need carry out the operation of dismounting under water to the skeleton nut that returns dress.
Summary of the invention
The purpose of the utility model is to provide a kind of underwater operation device that is used for the dismounting of nuclear fuel assembly skeleton nut, can be when inspection and refuelling rod, and dismounting skeleton nut, thus take, recombinate skeleton structure apart.
The technical scheme of the utility model is following: a kind of underwater operation device that is used for the dismounting of nuclear fuel assembly skeleton nut comprises sleeve, core bar and tubular key head, wherein; Sleeve is a ladder cylindrical drum structure; The sleeve lower end is installed with the tubular key head, and core bar is the elongate rod that runs through sleeve and tubular key head, and in the core bar lower end jacking block is installed; Can make jacking block up and down in the through hole cavity of tubular key head; Sleeve upper end intracavity diameter shrinks, and forms a boss, and all there is one section bulge-structure on part and core bar top that barrel bore is stretched in the core bar upper end; And be provided with spring between core bar top bulge-structure and the sleeve upper surface, the bulge-structure that can make the core bar upper end stretch into barrel bore is stuck on the boss of sleeve upper end inner chamber.
Described tubular key head through-hole wall and nuclear fuel assembly skeleton nut closely cooperate, and can tighten the weight of support core fuel assembly skeleton nut self.
The outside, described sleeve upper end is through the bolt jug.
The remarkable result of the utility model is: the described a kind of tubular key head that is used for the underwater operation device of nuclear fuel assembly skeleton nut dismounting of the utility model can closely cooperate with nuclear fuel assembly skeleton nut; The effect of support core fuel assembly skeleton nut self realizes this device dismounting function under water; Simultaneously, the upper end of core bar is supported through spring, and the lower end of core bar is equipped with jacking block, can guarantee behind dismounting nuclear fuel assembly skeleton nut its release, and when not required, not influence other operations.
Description of drawings
Fig. 1 is the described a kind of underwater operation apparatus structure synoptic diagram that is used for the dismounting of nuclear fuel assembly skeleton nut of the utility model;
Among the figure: 1, handle; 2, sleeve; 3, core bar; 4, tubular key head; 5, jacking block; 6, spring.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is done further explain.
As shown in Figure 1, a kind of underwater operation device that is used for the dismounting of nuclear fuel assembly skeleton nut comprises sleeve 2, core bar 3 and tubular key head 4; Wherein, sleeve 2 is a ladder cylindrical drum structure, and passes through bolt jug 1 in the outside, sleeve 2 upper ends; Sleeve 2 upper end intracavity diameters shrink, and form a boss, and sleeve 2 lower ends are installed with tubular key head 4; Tubular key head 4 through-hole walls cooperate closely with nuclear fuel assembly skeleton nut; Can tighten the weight of holding nut self, core bar 3 is for running through the elongate rod of sleeve 2 and tubular key head 4, and the lower end of core bar 3 is equipped with jacking block 5; Can make jacking block 5 up and down in the through hole cavity of tubular key head 4; All there is one section bulge-structure on part and core bar 3 tops that sleeve 2 inner chambers are stretched in core bar 3 upper ends, and between core bar 3 top bulge-structures and sleeve 2 upper surfaces, spring 6 are installed, and the bulge-structure that can make core bar 3 upper ends stretch into sleeve 2 inner chambers is stuck on the boss of sleeve 2 upper end inner chambers.
The described a kind of concrete course of work of underwater operation device that is used for the dismounting of nuclear fuel assembly skeleton nut of the utility model is: when nuclear fuel assembly skeleton nut is installed; On the coast new nuclear fuel assembly skeleton nut is packed in the tubular key head 4; Through handle 1 whole device installation is hanging on the frame position that needs to install; Video equipment under the tie water, confirm that putting position is correct after, screw sleeve 2 till can not rotate; Promote whole device, accomplish the installation of skeleton nut under water; When dismounting nuclear fuel assembly skeleton nut; Video equipment under the tie water places this device on the skeleton nut location that needs dismounting, after the affirmation putting position is correct; Screwing sleeve 2 to nuclear fuel assembly skeleton nut and nuclear fuel assembly bottom throws off fully; The underwater operation device that will have nuclear fuel assembly skeleton nut moves to the waste holder place, promotes jacking block 5 through core bar 3, and nuclear fuel assembly skeleton nut is released in tubular key head 4; Fall in the waste holder, accomplish the dismounting of nuclear fuel assembly skeleton nut under water.

Claims (3)

1. underwater operation device that is used for the dismounting of nuclear fuel assembly skeleton nut; Comprise sleeve (2), core bar (3) and tubular key head (4); Wherein, sleeve (2) is a ladder cylindrical drum structure, it is characterized in that: sleeve (2) lower end is installed with tubular key head (4); Core bar (3) is for running through the elongate rod of sleeve (2) and tubular key head (4); And in core bar (3) lower end jacking block (5) is installed, can makes jacking block (5) up and down in the through hole cavity of tubular key head (4), sleeve (2) upper end intracavity diameter shrinks; Form a boss; All there is one section bulge-structure on part and core bar (3) top that sleeve (2) inner chamber is stretched in core bar (3) upper end, and are provided with spring (6) between core bar (3) top bulge-structure and sleeve (2) upper surface, and the bulge-structure that can make core bar (3) upper end stretch into sleeve (2) inner chamber is stuck on the boss of sleeve (2) upper end inner chamber.
2. a kind of underwater operation device that is used for the dismounting of nuclear fuel assembly skeleton nut according to claim 1; It is characterized in that: described tubular key head (4) through-hole wall and nuclear fuel assembly skeleton nut closely cooperate, and can tighten the weight of support core fuel assembly skeleton nut self.
3. a kind of underwater operation device that is used for the dismounting of nuclear fuel assembly skeleton nut according to claim 1 is characterized in that: the outside, described sleeve (2) upper end is through bolt jug (1).
CN2011203889067U 2011-10-13 2011-10-13 Underwater operating device for disassembling and assembling nuts of nuclear fuel assembly framework Expired - Lifetime CN202307177U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011203889067U CN202307177U (en) 2011-10-13 2011-10-13 Underwater operating device for disassembling and assembling nuts of nuclear fuel assembly framework

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011203889067U CN202307177U (en) 2011-10-13 2011-10-13 Underwater operating device for disassembling and assembling nuts of nuclear fuel assembly framework

Publications (1)

Publication Number Publication Date
CN202307177U true CN202307177U (en) 2012-07-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011203889067U Expired - Lifetime CN202307177U (en) 2011-10-13 2011-10-13 Underwater operating device for disassembling and assembling nuts of nuclear fuel assembly framework

Country Status (1)

Country Link
CN (1) CN202307177U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106128531A (en) * 2016-07-05 2016-11-16 中国核动力研究设计院 A kind of assembly and disassembly methods of fuel assembly base under water

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106128531A (en) * 2016-07-05 2016-11-16 中国核动力研究设计院 A kind of assembly and disassembly methods of fuel assembly base under water

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GR01 Patent grant
CX01 Expiry of patent term

Granted publication date: 20120704

CX01 Expiry of patent term